This study examines how communication of social support influences the behavioral change process in a particular environment. Specifically, the research question is: How is social support related to commitment to recovery from alcoholism/addiction? A one group pre-test/post-test research design was used with subjects in two addictions treatment centers. Questions were designed to measure changes that took place in individual's perception of supportiveness of messages received, the network support available to them, changes in uncertainty and self-esteem. Finally, how these variables predict commitment to recovery was examined. Results showed no relationship between strength of network at time 1 and the supportiveness of messages received. Strength of network support, self-esteem, and uncertainty reduction improved from time 1 to time 2. The major predictor of a patient's commitment to recovery was the level of self esteem at time 2. However, a strong correlation was found between self-esteem and strength of network at time 2.